Portable high-frequency apparatus.



No. 775,869. PATENTBD NOV. 22, 1904. P. P. STRONG. PORTABLE HIGH FREQUENCY APPARATUS.

APPLICATION FILED MAY 23. 1904.

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WW WM. Zmmww' No. 775,869. PATBNTED NOV. 22, 1904.

P. E. STRONG. PORTABLE HIGH FREQUENCY APPARATUS.

APPLICATION FILED MAY 23. 1964. N0 MODEL. 2 SHEETS-SHEET 2.

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l\ r V Patented November 22, 1904:.

UNITED STATES PATENT OFFICE.

FREDERICK F. STRONG, OF BOSTON, MASSAOIIUSE'LTS.

PORTABLE HIGH-FREQUENCY APPARATUS.

SPECIFICATION forming part of Letters Patent No. 775,869, dated November 22, 1904.

Application filed May 23,1904. Serial No. 209,297. (No model.)

To a who/1t it Huey concern:

Be it known that I, FREDERICK F. STRONG, a citizen of the United States, and a resident of Boston, in the Commonwealth of Massachusetts, have invented an Improvement in Portable High-Frequency Apparatus, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings rep resenting like parts.

My invention relates to high-frequency apparatus, and is principally intended for therapeutical uses, my object being to provide a compact simple outfit adapted to the practical requirements of the ordinary physician and surgeon.

To this end my invention resides, so far as relates to the present application, (certain novel portions contained herein being separately described and claimed in copending applications,) in arranging each of the segregable parts by itself or, in other words, providing a series of units independently removable from the cabinet without requiring any skill or technical knowledge on the part of the user and when all assembled automatically connecting themselves in proper operative relation to produce with the utmost efliciency all the results desired by the most exacting user of high-frequency apparatus, including the X-ray and ultra-violet light.

The various constructional details and arrangement of parts of my invention will be pointed out in the course of the following description, reference being had to the accompanying drawings, in which I have illustrated one embodiment of my invention, and the latter will be more particularly defined in the appended claims.

In the drawings, Figure 1 is a perspective view of the cabinet complete. Fig. 2 is a perspective view thereof, omitting the end and top and also portions of the interior. Fig. 3 is an end view thereof, simply omitting the end and top, but leaving all the contained parts in proper position. Figs. i, 5, and 6 are perspective views of the separate units removed from the cabinet. Fig.7 is a diagrammatic view illustrating the wiring and relation of the parts.

Referring to Fig. 7 in order to present concisely the general arrangement of parts it will be seen that from a suitable source of energy a conductors at lead to a step-up transformer 4 whose secondary terminals (1 a" lead to the primary (4" of a high-frequency transformer or inductor a, a condenser being interposed across the wires (0" a and a high-frequency spark-gap a being interposed in the wire a" in series therewith. A variable inductance or resistance a," is interposed in the wire a, and from the opposite sides thereof conductors a a operate a motor a. for driving the rotary spark-gap a a resistance 0. being interposed in the wire a. The inductor or oscillator a has the terminals of its secondary a connected at a a, respectively, to pillars containing opposite electrodes (o a, and in connection with the former I employ a variable air-gap a to the opposite side of which at the pillar a a hand-electrode a, herein shown as a vacuum-electrode adapted to be applied directly to the body, is connected, the circuit being completed by means of an opposite handelectrode a, secured to the post 11/ The variable air-gap a and special form of rotary spark-gap a herein disclosed, form the subjects-matter of concurrently-pending ap' plications, in which they are duly claimed and their special advantages and operation fully set forth.

The cabinet consists of an outer case or rectangular box B, having a hinged top I) and a removable end which maybe secured in any suitable manner, as by screws 6 \Vithin the cabinet opposite ledges or ways I) are provided, on top of which is removably seated a receptacle 1)", having a compartment extending lengthwise thereof at its front side, in which is mounted the inductor or electrostatic transformer a, being embodied therein in wax or other suitable permanent insulation and containing three threaded stubs or terminal posts 6 6 F for receiving, respectively, the pillars a a, and (0 the middle post, L being insulated or acting as a dummy, simply supporting the pillar a At the rear of the compartment If is a compartment 6 for holding the pillars, the X-ray tubes, electrodes, and removable parts of the apparatus when not in use. On the under side of the box or receptacle 7)" is a cleat 7)", having a slideway on its inner side in alinement with a similar slideway I), provided on the inner side of the rear ledge 6 These two slideways serve removably to receive the condenser (4 In the lower part of the cabinet is removably mounted a receptacle 7), containing the electromagnetic transformer (0 and on a platform or ledge I), projecting at the lower front edge thereof, is mounted the spark gap or wheel a and motor a, the resistance a being shown as formed in the shape of a spool or tube projecting from said receptacle 5.

The variable inductance or main resistance a may be mounted in any convenient position in or on the box, being herein shown as mounted on the removable end 6 thereof and operated by a rotary handle 5 Adjacent thereto is a socket I) of any usual kind to cooperate with a plug 1)", said socket being normally closed by means of a hinged plate I). (Shown as open in Fig. 1.)

Each unit is provided with contact plates or devices, the ledge 7) carrying contacts 5 for connection from the resistance a" to the transformer in the receptacle F and to the motor (0 and box I), carrying spring-contacts 72 6 for slidingly engaging contacts 6 5 permanently fastened to the front slideway 6 The receptacle 6 is provided with contact-plates 1) b on its under side adapted to engage with the strap-contacts 5 just mentioned, and the condenser has its opposite terminals connected by plates 5 I) for contacting with opposite plates [2 6 at the opposite ends of the cabinet. All of these parts are connected by suitable wires, as shown, each wire, however, being confined to one of the unitary parts and the contacts made by the plates already mentioned.

In the front side of the box opposite the high-frequency spark-gap a I have provided a window 6 which may be closed by a shutter 6 and is provided with a quartz lens 5 for use with the ultra-violet light. The electrodes of the spark-gap a are regulated by very small screws 7/ b Opposite these screws are small openings If 6, the object of this construction being to make it impossible for the user to come in contact with the current. ter, he must use a small special tool If, adapted only to enter the small opening 5 or 5 as the case may be, and as all the separate parts of the mechanism are permanently retained in their various receptacles and when in operative circuit with each other are inclosed entirely within the cabinet it results that no accident can possibly occur to the user by getting in circuit with the active current. This feature of my invention is of considerable practical importance when it is remembered that this apparatus is liable to get into In order to adjust the interrupi there is considerabledanger from short-circuiting the apparatus at an improper point.

If any portion of the apparatus gets out of order, all that the user has to do is to remove the box or unit containing said portion of the apparatus and ship it to the factory for re pair without disturbing the rest of the apparatus. \Vhen the repaired portion is sent back to him, he needs no skill whatever to place it properly in circuit with the rest of the apparatus, inasmuch as it is impossible for him to put it in any but the correct position and relation.

In use having taken the three pillars from their compartment 7)" the operator mounts them in position on the posts I) 6, as shown in Fig. 1, and then inserts the plug 7), thereby connecting the apparatus to a convenient source of alternating-current supply, whereupon the apparatus is ready for use.

One of my objects is to provide an apparatus which cannot be used improperly, and from the foregoing it will be seen that practically all that the operator can do is to vary the resistance, (by turning the handle 0 Moreover, the construction is simple and inexpensive, and all the parts must remain the same as adjusted at the factory.

If desired, the small motor 11 and adjacent mechanism may be carried on a platform separate from the transformer-case I); but for convenience of wiring I have made the latter and the platform or ledge I! removable together.

Various other changes and substitutions may be resorted to without departing from the spirit and scope of my invention.

Having described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is-

1. A portable high-frequency apparatus, comprising a cabinet containing a transformer, condenser, high-frequency inductor, each of said parts being constructed and incloscd as a separate unit, independently mounted in and removable from said cabinet, each of said units having fixed contacts, cooperating with adja cent fixed contacts for automatically placing the apparatus in proper circuit relations when all the units are mounted in the cabinet.

2. A portable, high-frequency apparatus, comprising acabinet having longitudinal slideways, a receptacle mounted on said ways, containing a compartment provided with a highfrequency inductor, an independently-removable condenser, slideways normally supporting the same, and a transformer carried by said cabinet beneath said before-mentioned parts.

3. A portable high-frequency apparatus, having all its diiferent sets of mechanism constructed as separate units independently removable and provided respectively with platethe hands'of unskilled persons and also that contacts for automatic electrical connection in lIO Wrasse proper relation when the separate units are placed in the cabinet.

4. A portable high-frequency apparatus, comprising a cabinet provided with a receptacle containing a high-frequency inductor embedded therein and having three posts projecting therefrom, two of said posts being connected respectively with terminals of the secondary thereof and removably supporting pillars containing opposite discharge-terminals, the third post being insulated from the rest of the apparatus and containing a terminal cooperatingwith an opposite terminal provided in one of the adjacent pillars, a handelectrode for completing the circuit about said secondary through said insulated terminal.

5. A portable high-frequency apparatus, including a cabinet, containing a high-frequency spark-gap and cooperating mechanism i'or generating a light at the dischargeterminals of the said spark-gap, and a window opposite said discharge-terminals provided with means for transmitting the said light. said mechanism being constructed in units remova bly mounted, independently of each other in said cabinet.

6. A portable high-frequency apparatus, having its various parts independently inclosed in separate unitary I'GCQptfl-ClGS, and a spark-gap having small regulating-screws, and small openings in said cabinet opposite said screws, limited in area to the size of said screws, so that an 0perating-tool entering said openings can contact only with said screws, thereby rendering regulation of the apparatus convenient without any possibility of injury from the current.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FREDERICK F. STRONG.

Witnesses:

T. M. STRONG, GEo. H. MAXWELL. 

